<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
</head>
<body>

<form action="demo-form.php" method="get">
  <input type="checkbox" name="vehicle[]" value="Bike"> I have a bike<br>
  <input type="checkbox" name="vehicle[]" value="Car" checked="checked"> I have a car<br>
  <input type="submit" value="提交">
</form>

</body>
</html>